Compaq dc7100 HP Compaq dc71xx and dx61xx Series Business Desktop Computers Te - Page 42

System Overview 2.4.3 Support Components Input/output functions not provided by the chipset are handled by other support components. Some of these components also provide "housekeeping" and various other functions as well. Table 2-4 shows the functions provided by the support components. Table 2-4 Support Component Functions Component Name Function LPC47B397 I/O Controller Keyboard and pointing device I/F Diskette I/F Serial I/F (COM1and COM2) Parallel I/F (LPT1, LPT2, or LPT3) PCI reset generation Interrupt (IRQ) serializer Power button and front panel LED logic GPIO ports Processor over tempurature monitoring Fan control and monitoring Power supply voltage monitoring SMBus and Low Pin Count (LPC) bus I/F BCM5751 Ethernet Controller 10/100/1000 Fast Ethernet network interface controller. AD1981B Audio Codec Audio mixer Digital-to-analog converter Analog-to-digital converter Analog I/O 6-channel audio support 2.4.4 System Memory These systems implement a dual-channel Double Data Rate (DDR) memory architecture. All dx6100 and dc7100 models support PC2700 (333- MHz) and PC3200 (400-MHz) DIMMs. Only dx6120 models support DDR2, PC2-4300 (533-MHz) DIMMs. ✎ DDR and DDR2 DIMMs are NOT interchangeable. Memory type is defined by the system board. The USDT system provides three DIMM sockets supporting up to 3 GB of memory while all other form factors provide four DIMM sockets and support a total of four gigabytes of memory. ✎ The maximum memory amounts stated above are with 1-GB memory modules using 1-Gb technology DIMMs. 2-26 361834-002 Technical Reference Guide